22 May 2012  Marking the International Day for Biological Diversity, Secretary-General Ban Ki-moon today highlighted the fragile state of the world’s oceans, urging greater protection for marine biodiversity.

“Oceans cover almost three-quarters of the surface area of the globe. They are home to the largest animal known to have lived on the planet – the blue whale – as well as billions upon billions of the tiniest of microorganisms. From sandy shores to the darkest depths of the sea, oceans and coasts support a rich tapestry of life on which human communities rely,” Mr. Ban said in a message to mark the Day.

“Yet, despite its importance, marine biodiversity… has not fared well at human hands,” he added.

The General Assembly proclaimed 22 May as the International Day for Biological Diversity, to increase understanding and awareness of biodiversity issues. The theme for this year’s observance is marine diversity.

In his message, Mr. Ban noted the impact of commercial over-exploitation of the world’s fish stocks, with more than half of global fisheries exhausted and a further third depleted, and between 30 and 35 per cent of critical marine environments – such as seagrasses, mangroves and coral reefs – estimated to have been destroyed. As well, plastic debris continues to kill marine life, and pollution from land is creating areas of coastal waters that are almost devoid of oxygen.

“Added to all of this, increased burning of fossil fuels is affecting the global climate, making the sea surface warmer, causing sea level to rise and increasing ocean acidity, with consequences we are only beginning to comprehend,” he noted.

According to the Secretariat of the Convention on Biological Diversity (CBD), the survival of marine and coastal ecosystems and biodiversity is essential to the nutritional, spiritual, societal and religious well-being of many communities, and not just those in coastal areas. Amongst its findings, it notes that fisheries provide more than 15 per cent of the global dietary intake of animal protein; oceans and coastal areas provide invaluable ecosystem services, from tourism to protection from storms; and, minuscule photosynthesizing plants called phytoplankton provide 50 per cent of all the oxygen on Earth.

Amidst the concerns over the future of marine biodiversity, Mr. Ban said, “there is hope.” He pointed to a 2011 scientific review which showed that, despite all the damage inflicted on marine wildlife and habitats over the past centuries, between ten and 50 per cent of populations and ecosystems have shown some recovery when human threats were reduced or removed.

“However, compared to the land – where nearly 15 per cent of surface area is under some kind of protection – little more than one per cent of marine environments are protected,” the UN chief said. “Lately, some progress is being made, particularly with the establishment of large-scale marine reserves and documenting areas of ecological or biological significance in open-ocean and deep-sea habitats.”

Mr. Ban said the upcoming UN Conference on Sustainable Development (Rio+20), in Rio de Janerio, Brazil, next month, will provide an opportunity to recommit to building on advances made so far.

“Rio+20 must galvanize action to improve the management and conservation of oceans through initiatives by the United Nations, governments and other partners to curb overfishing, expand marine protected areas and reduce ocean pollution and the impact of climate change,” Mr. Ban said. “By taking action at the national, regional and global levels, including enhancing international cooperation, we can achieve the Aichi Biodiversity Target of conserving 10 per cent of marine and coastal areas by 2020, a crucial step in protecting marine biodiversity for the future we want.”

The CBD entered into force in December 1993, with three main objectives: the conservation of biological diversity, the sustainable use of the components of biological diversity, and the fair and equitable sharing of the benefits arising out of the utilization of genetic resources.